Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The JBL Go 5 ranks #29 of 62 small speakers by sound quality at $54.95; the Sony ULT Field 1 ranks #99 of 179 medium speakers by sound quality at $138.
Different sizes. The Go 5 is a small 0.5 lbs (230 g) speaker. The ULT Field 1 is a medium 1.4 lbs (650 g) speaker with a woofer, a tweeter and a passive radiator. Each is rated within its own class, and neither leads its class on sound.
The ULT Field 1 has an upper midrange peak and rolled off treble, but real world battery of 28 hours or more with ULT mode off, a built-in microphone, IP67 and stereo pairing.
The Go 5 lacks bass and clarity and gets harsher rather than louder at maximum volume. It is IP68, has a 7-band app EQ, Auracast and a USB-C wired audio input, with 8 to 10 hours of battery.
For better sound in either size, see the small and medium rankings.
Buy the JBL Go 5 at $54.95 if you want a small speaker. Buy the Sony ULT Field 1 at $138 if you want a medium speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| JBL Go 5 | Sony ULT Field 1 | |
|---|---|---|
| Price | $54.95 | $138.00 |
| Ranked | #29 of 62 in Small Size Portable Bluetooth Speakers | #99 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 8 hours, 10 with Playtime Boost (Manufacturer specified) | 12 hours (Manufacturer specified) |
| EQ | Yes | Yes |
| IP Rating | IP68 | IP67 |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | No |
| TWS | Yes | Yes |
| Weight | 0.5 lbs (230 g) | 1.4 lbs (650 g) |
| Aux Input | No | No |
| Digital Aux Input | Yes (USB-C) | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LC3 | AAC, SBC |
| Built-in Microphone | No | Yes |
| Bluetooth Version | 6.0 | 5.3 |
| Frequency Response | 100Hz - 19kHz (Manufacturer specified) | - |
| Dimensions | 4” x 3” x 1.7” (101 x 77 x 43 mm) | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Charging Time | 3 hours | - |
| Drivers | 45mm | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| Amplifier Power | 4.8W | - |
| Lights | Yes | - |
| Strap | Yes (built-in loop) | Yes (detachable strap) |
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